The North Star is CHANGING #shorts

Everyone knows that Polaris, is the North Star, but did you know that this will actually CHANGE? In just 5,470 years, this star, Al Dare a min will be the North Star, and in about 13,000 years, it will have changed again to the super bright star Vega. So why does the North Star change over time? The main reason is that Earth is not quite spherical. It is just slightly wider at the equator than it is at the poles and this equatorial bulge interacts with the sun and moon’s gravity to give the spinning earth a slow wobble that we call precession. The whole precessional cycle for the earth takes about 26,000 years and in that time many different stars will be the ones closest to the north celestial pole, whichever one is closest at any given time is what we call the north star. Polaris was closest to the north celestial pole in 2017, but now is getting further and further away from it every day, but will still be the North Star for many years to come.

[cslloyd]

Hey Siri, remind me to change the north star in 5470 years.

[IslandDaBay]

So excited to see Vega as been the North Star. Can’t wait

[randyegibson]

That's amazing! Thank you for sharing this.

[seanspartan]

This is why ancient Egyptian star markers need adjustments. Polaris wasn't the north star when they were made.

[ryanmathur]

Man really said : in "just" 5470 yrs

[DIYmonkey]

This is now what I will blame my mounts pointing accuracy on..

[Mindfultranslations]

Thanks for sharing.. fascinating information

[JesseTwillaTUBA]

Vega would make it so much easier loll, even in my high bortle skies it's so easy to spot!

[theldraspneumonoultramicro]

important to remember is also the fact that nothing in space is static, we are moving around the sun, the sun is moving around Sagittarius A, a supermassive black hole at the center of our galaxy, pretty much all those dots out there are stars, and they to move around Sagittarius A, and with time, those dots location in the night sky will change.
like for example, the location we see Polaris at now is where it was roughly 430 years ago.
oh, and we also have a south star, but its just barely vissible to the naked eye, that star is Sigma Ocantis.

[Andre-vrul]

Very Intredasting!
Will all the other stars continue to rotate perfectly around these new pole stars?

[RocketStrafe]

So that’s why my polar alignment is off…

[ericlmercer]

Cool how each North Star candidate gets nice n bright to play its role in navigation. How come that hole in the Great Pyramids still lines up precisely with Polaris? What happened to earths precession? Science is so magical.

[martynh]

I did not know this!! Thanks for the info.

[joeysane]

The north star always guides me
When winter skies are gray
And I wait for sun when all are one
I shall not betray
Calling at me
I'm waiting when all are led astray

[IGATECK]

I guess I'll be returning my polar alignment scope

[PLARice]

That is all well and good but are we going to pick up a South Star through any of this?

[chrisprenmusic]

Cool! What was the North Star 5000 years ago?

[gregorysamaniego]

Could precession explain climate change? I mean Egypt was green about 5000 years ago?

[Korruptor]

Hello to the people watching this in the year 7492 👁👄👁

[MacDeth]

What does this mean for polar alignment scopes? How long do we have until a polar scope of today becomes obsolete/unusable?